<?php
 include("pChart/pData.class");
 include("pChart/pChart.class");

 $i1=8.7;
 $i2=18.2;

 // Dataset definition
 $DataSet = new pData;
 $DataSet->AddPoint($i1,"Serie1");
 $DataSet->AddPoint($i2,"Serie2");

 $DataSet->AddAllSeries();
 $DataSet->SetAbsciseLabelSerie();
// названия в легенде
 $DataSet->SetSerieName("i1","Serie1");
 $DataSet->SetSerieName("i2","Serie2");

 // Initialise the graph
 $Test = new pChart(400,230);

 $Test->setFontProperties("Fonts/tahoma.ttf",8);
 $Test->setGraphArea(50,30,380,200);
 $Test->drawFilledRoundedRectangle(7,7,693,223,5,240,240,240);
 $Test->drawRoundedRectangle(5,5,695,225,5,230,230,230);
 $Test->drawGraphArea(255,255,255,TRUE);
 $Test->drawScale($DataSet->GetData(),$DataSet->GetDataDescription(),SCALE_START0,150,150,150,TRUE,0,2,TRUE);
 $Test->drawGrid(4,TRUE,230,230,230,50);

 // Draw the 0 line
 $Test->setFontProperties("Fonts/tahoma.ttf",6);
 $Test->drawTreshold(0,143,55,72,TRUE,TRUE);

 // Draw the bar graph
 $Test->drawBarGraph($DataSet->GetData(),$DataSet->GetDataDescription(),TRUE,80);

 // Finish the graph
 $Test->setFontProperties("Fonts/tahoma.ttf",8);
 $Test->drawLegend(326,150,$DataSet->GetDataDescription(),255,255,255);
 $Test->setFontProperties("Fonts/tahoma.ttf",10);
 $Test->drawTitle(50,22,"Title",50,50,50,385);
 $Test->Render("tmp/g.png");

 echo '<img src="tmp/g.png" />';
?>

...
// Write values on Serie1 & Serie2..
 $Test->setFontProperties("Fonts/tahoma.ttf",12);
 $Test->writeValues($DataSet->GetData(),$DataSet->GetDataDescription(),array("Serie1","Serie2"));
...